Faculty Profiles - TEI Kokukei

Papers - TEI Kokukei

Division display 261 - 265 of about 265 ／ All the affair displays >>

Energy gap of proximity-effect-induced superconductivity in NbCu multilayers

G. q. Zheng, Y. Kitaoka, Y. Oda, Y. Kohori, K. Asayama, Y. Obi, H. Fujimori, R. Aoki

Physica B: Physics of Condensed Matter 165-166 ( 1 ) 481 - 482 1990

Language：English Publishing type：Research paper (scientific journal)

The nuclear spin-lattice relaxation rate, T1-1, for 63Cu in zero field from 4.2K down to 0.3K, has been measured in a series of NbCu multilayers. A BCS-like temperature dependence of T1-1 followed gradually by A Korringa-law-like one at low temperatures, has been found. It has been confirmed that such behavior of T1-1 comes from the anisotropic energy gap in the Cu-layers. © 1990.

DOI： 10.1016/S0921-4526(90)81090-B

Scopus

researchmap

NMR Study of the Proximity Effect in Nb-Cu Multilayers 共著

Zheng Guo-qing, Kohori Yoh, Oda Yasukage, Asayama Kunisuke, Aoki Ryozo, Obi Yoshihisa, Fujimori Hiroyasu

J. Phys. Soc. Jpn. 58 ( 1 ) 39 - 42 1989.1

Language：English Publisher：The Physical Society of Japan (JPS)

A series of measurements on the nuclear spin-lattice relaxation rate, $T_{1}^{-1}$, of 63Cu in superconducting multilayer Nb–Cu has been performed over a temperature range from 4.2 K down to 0.3 K, using the field cycling method. $T_{1}^{-1}$ decreases rapidly after an initial increment just below $T_{\text{c } }$. At low temperatures, however, the rate of the decrease slows down, and $T_{1}^{-1}$ decreases in proportion to temperature. It has been concluded that such behavior of $T_{1}^{-1}$ originates from a distribution of the energy gap of the Cooper pairs in Cu. The electrons which are propagated nearly normal to the S–N interface have a finite energy gap predicted by McMillan, while the electrons propagated nearly parallel to the interface are gapless and behave like normal electrons.

DOI： 10.1143/JPSJ.58.39

CiNii Article

CiNii Books

researchmap

NMR observation in Nd1.85Ce0.15 CuO4-y

Guo-Qing Zheng, Yoshio Kitaoka, Yasukage Oda, Kunisuke Asayama

Journal of the Physical Society of Japan 58 ( 6 ) 1910 - 1913 1989

Language：English Publishing type：Research paper (scientific journal)

An anomalous Cu NMR signal with extremely small e2qQ has been observed in the oxide superconductor Nd1.85Ce0.15 CuO4-y The Knight shift decreased significantly as temperature decreased below Tc The temperature-independent T1 of 63Cu suggests that the relaxation is dominated by the fluctuation of the Nd-moment, and no magnetic order is achieved for this content of Ce. © 1989, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

DOI： 10.1143/JPSJ.58.1910

Scopus

researchmap

CU-63 NMR-STUDY OF SUPERCONDUCTING CU/NB MULTILAYER-FILM Reviewed

R AOKI, Y KOHORI, GQ ZHENG, Y ODA, K ASAYAMA, S WADA

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 56 ( 12 ) 4495 - 4502 1987.12

CU-63 NMR-STUDY OF SUPERCONDUCTING CU/NB SUPERLATTICE Reviewed

R AOKI, GQ ZHENG, Y KOHORI, Y ODA, K ASAYAMA, S WADA, Y OBI

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 26 1455 - 1456 1987

　 PREV - NEXT 　

< TEI Kokukei >

Papers - TEI Kokukei